summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--arch/parisc/kernel/entry.S11
-rw-r--r--arch/parisc/kernel/setup.c3
-rw-r--r--arch/parisc/kernel/traps.c35
3 files changed, 21 insertions, 28 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index c5ef4081b01d..b2fdc44da0d5 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -646,17 +646,12 @@
/*
- * Align fault_vector_20 on 4K boundary so that both
- * fault_vector_11 and fault_vector_20 are on the
- * same page. This is only necessary as long as we
- * write protect the kernel text, which we may stop
- * doing once we use large page translations to cover
- * the static part of the kernel address space.
+ * Fault_vectors are architecturally required to be aligned on a 2K
+ * boundary
*/
.text
-
- .align 4096
+ .align 2048
ENTRY(fault_vector_20)
/* First vector is invalid (0) */
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 72a3c658ad7b..f097762d3922 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -377,6 +377,7 @@ arch_initcall(parisc_init);
void start_parisc(void)
{
extern void start_kernel(void);
+ extern void early_trap_init(void);
int ret, cpunum;
struct pdc_coproc_cfg coproc_cfg;
@@ -397,6 +398,8 @@ void start_parisc(void)
panic("must have an fpu to boot linux");
}
+ early_trap_init(); /* initialize checksum of fault_vector */
+
start_kernel();
// not reached
}
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index b99b39f1da02..553b09855cfd 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -807,7 +807,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
}
-int __init check_ivt(void *iva)
+void __init initialize_ivt(const void *iva)
{
extern u32 os_hpmc_size;
extern const u32 os_hpmc[];
@@ -818,8 +818,8 @@ int __init check_ivt(void *iva)
u32 *hpmcp;
u32 length;
- if (strcmp((char *)iva, "cows can fly"))
- return -1;
+ if (strcmp((const char *)iva, "cows can fly"))
+ panic("IVT invalid");
ivap = (u32 *)iva;
@@ -839,28 +839,23 @@ int __init check_ivt(void *iva)
check += ivap[i];
ivap[5] = -check;
-
- return 0;
}
-#ifndef CONFIG_64BIT
-extern const void fault_vector_11;
-#endif
-extern const void fault_vector_20;
-void __init trap_init(void)
+/* early_trap_init() is called before we set up kernel mappings and
+ * write-protect the kernel */
+void __init early_trap_init(void)
{
- void *iva;
+ extern const void fault_vector_20;
- if (boot_cpu_data.cpu_type >= pcxu)
- iva = (void *) &fault_vector_20;
- else
-#ifdef CONFIG_64BIT
- panic("Can't boot 64-bit OS on PA1.1 processor!");
-#else
- iva = (void *) &fault_vector_11;
+#ifndef CONFIG_64BIT
+ extern const void fault_vector_11;
+ initialize_ivt(&fault_vector_11);
#endif
- if (check_ivt(iva))
- panic("IVT invalid");
+ initialize_ivt(&fault_vector_20);
+}
+
+void __init trap_init(void)
+{
}